Sunday, July 8, 2012

Milk Is Not Health Food

As scientific investigators have traced the causes of heart disease, cancer, arthritis, migraines, and digestive problems, the least likely suspect had to be milk. We poured it on our cereal, pushed it on our children, and couldn’t imagine it to be anything but healthful. But more and more researchers now view milk with skepticism about its benefits and concern about its risks. They are linking the epidemics of prostate cancer, digestive problems, and other ills to our habitual consumption of specific foods, including—and especially—milk.

More and more researchers now view milk with skepticism about its benefits and concern about its risks.

Certainly, every baby needs breast milk. But when northern Europeans brought cow’s milk into their diets a few thousand years ago, it was the first time any animal had consumed the milk of another species. It was also the first time anyone had ever defied the weaning process that stops adults from taking in the nutrient mix intended for infants.

Cow’s milk consumption by infants and toddlers is linked to type 1 (“childhood-onset”) diabetes and to anemia, due in part to its interference with iron absorption in the digestive tract. As children grow older, milk is a major source of saturated fat, the “bad” fat that raises cholesterol levels and increases the risk of heart disease and breast cancer. As children reach their teen years, many experience cramps and diarrhea due to lactose intolerance. This is especially true for those of African, Asian, Hispanic, Native American, or Mediterranean heritage. Researchers have more recently adduced evidence linking milk to acne, arthritis, and migraines.

But it was the links to prostate cancer that made the scientific community sit up and take notice. Abundant international data and two huge Harvard studies showed that milk-drinking men have a significantly higher risk of prostate cancer, compared to men who avoid milk. The reason seems to be milk’s ability to alter a man’s hormone function. Links with ovarian cancer have also come to the fore.

People who care about animals have shunned the dairy industry because it is the source of veal. In order to maintain maximal milk production, farmers impregnate cows annually. Their male calves cannot join the dairy herd and are placed in crates to be raised as veal. Environmentalists have joined the chorus of critics of huge factory-like dairy farms.

The final nail in the dairy industry’s coffin may be its failure to deliver on its number-one promise—“building strong bones.” At Penn State University, Tom Lloyd, Ph.D., followed a group of girls from age 12 through age 22, and found that milk did nothing to strengthen their bones. In a new review in Pediatrics, PCRM’s Amy J. Lanou, Ph.D., summarizes Dr. Lloyd’s findings and those of the many other researchers who have put milk to the test. At the other end of the age spectrum, Harvard’s Nurses’ Health Study followed women for 18 years, finding that milk-drinkers had no protection against fractures, compared to women who drank little or no milk.

Like “hormone replacement therapy,” which turned out to cause the very heart problems it was supposed to prevent, milk fails miserably in its promise to “do a body good.” The truth turns out to be precisely the opposite.

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